Lead: Almost everyone knows the decoration pollution, and heard decoration pollution can cause a variety of diseases. Internet has vast amounts of information and decoration pollution, some even say that the decoration materials pollution can cause cancer and even death. Today to introduce you to hear the most familiar to most formaldehyde pollution.
Almost everyone knows the decoration pollution, and heard decoration pollution can cause a variety of diseases. Internet has vast amounts of information and decoration pollution, some even say that the decoration materials pollution can cause cancer and even death.
Indeed, decoration of many pollutants, including benzene can be heard often, not very often heard ammonia and decane, cyclohexanone and the like. But to hear the most familiar to most public should be formaldehyde. Formaldehyde has become almost synonymous with the decoration pollution, and even become the CCTV Spring Festival Evening Pieces burden scripts. In addition to a variety of widely circulated formaldehyde "secret" and "tricks", but also a large number of equipment sales in addition to formaldehyde in the market. So, in the presence of formaldehyde in the end part of the decoration of which, what is the harm?
General home decoration is the most used man-made sheet. Whether ceiling or floor, large or small shoe closet, almost all made from a variety of plates. Conducted home improvement people should have heard all kinds of name plates, such as blockboard, plywood, particleboard, fiberboard, and so on. These sheets different names for different purposes, but also the appearance of a huge difference. But the same is that these man-made sheet in the production process will use phenolic resins and urea-formaldehyde resins and other industrial raw materials. These industrial materials contain formaldehyde.
Formaldehyde is a colorless gas with a pungent odor but. Soluble in water (which is also on the market in addition to the major principles of formaldehyde equipment), but also soluble in alcohol and ether. Is a widely used industrial materials. It also has a direct application, we are all familiar with the name of Formalin. Formalin is a concentration of 35% -40% aqueous solution of formaldehyde.
Formaldehyde has been research on pathogenic has a long history. In 2005, when the World Health Organization (WHO) international cancer research center affiliated (IARC) to determine formaldehyde as a carcinogen, there is clear evidence that formaldehyde causes nasopharyngeal cancer. Meanwhile, IARC that although there is clear evidence that formaldehyde and leukemia, but the formaldehyde-induced leukemia mechanism is unclear, any definitive conclusions have yet to be studied further. It should be noted that these studies are based on occupational exposure and not the population exposed to the decoration of formaldehyde pollution among. This is a huge difference between the two, the former is exposed to formaldehyde concentrations are far more opportunities with the latter. For non-professional staff formaldehyde pathogenic little research.
Some basic research is also worthy of attention. Studies have found that when a formaldehyde concentration of 1.34mg mice increased m3 / number of errors in the water maze at a concentration of 6.70mg / m3, retention of mice in water maze will be extended. This shows that formaldehyde neurotoxic effects. At a concentration of 4mg / m3 of spatial learning and memory in mice also had a significant effect. Another study showed that 15 days if the continuous inhalation of formaldehyde concentration of 4 mg / m3, and the outer peripheral lymphocyte DNA effects in rats have some damage. And with the formaldehyde concentration, will further exacerbate the damage exceeds 12 mg / m3 concentration of DNA- protein crosslinks make rats continuously exposed. This shows that formaldehyde genotoxicity and carcinogenicity.
However, ordinary people do not need to be afraid that they will therefore suffer from cancer. Common non-occupational exposure to formaldehyde people usually live in the space of formaldehyde concentration generally far lower than the above experimental results. Especially in recent years, as people's increasing emphasis on decoration pollution, environmental standards decoration materials are also rising. Related standards have been introduced. Our numbers 18580 to 18588 on both the national standards for formaldehyde indoor decoration materials limited release, covering plywood, solvent-based coatings, interior paint, wood furniture, flooring, carpet and other materials. China's "national indoor air quality standards" (GBT18883-2002) stipulated maximum allowable concentration of formaldehyde in indoor air is 0.1 mg / m3. Standard finite concentration and only the neurotoxicity in mice experiments the lowest concentration of 7.5% (1.34mg / m3). These measures have made the general population exposed to further reduce the chances of highly pathogenic risk concentration.
Formaldehyde released during renovation and decoration material selection and time concentration after the renovation related. Only for the purposes of fitting to use the maximum amount of all types of sheet, plate formaldehyde emission different from big to small are: MDF, Daixinban, finger-board, particle board, wood composite panels and wood panels.
There is a 81 Investigation newly renovated house for Qingdao show that the concentration of formaldehyde renovated six months later there is still more than half the national standard. Average concentration of formaldehyde that 81 was 0.12 mg / m3, 20% more than the national standard. Wherein the minimum value is 0.03 mg / m3, the highest value is 0.31 mg / m3. The number of minimum and maximum range of less than. Most is 0.08 mg / m3-0.12 mg / m3 between, there are as many as 22. This research indicates that the quality of decoration although not optimistic, but do not need to panic. After half a year since the decoration, the release of formaldehyde concentration will continue to decrease until a year after the renovation, substantially all of the renovated interior formaldehyde concentration can be reduced to GB limit. But to completely release formaldehyde and other clean, the earliest three years, and the longest is 15 years after the thing.
Seen in this light, six months after the arrival of the decoration is a more appropriate choice. At this time check, if the auxiliary exhaust formaldehyde reasonable measures to indoor formaldehyde concentration should be lower than the national standard. What method can effectively exclude formaldehyde it?
The method is simple and effective ventilation. Open windows formaldehyde concentration 0.16 mg / m3 of the room, five minutes after the concentration was reduced to 0.05 mg / 10 minutes to further reduce the concentration of 0.02 mg / m3. This shows that even if the concentration was much higher than the national standard room, ventilation methods can quickly reduce the concentration of formaldehyde in the air to GB or less.
The network also spread all kinds of methods in addition to formaldehyde. For example, onions, vinegar, charcoal and a variety of flowers. There is no evidence that these methods are effective, are nonsense.
There are many online about formaldehyde untrue statements, including some professionals are also involved in the spread. For example, many media quoted Dean of Life Sciences, Central China Normal University, Professor Yang as saying that high concentrations of formaldehyde pollution (1.0 mg / m3) can cause cell mutation and cancer (including leukemia) occur. This conclusion IARC (IARC) notice discrepancies. Announcement did not confirm a causal relationship between formaldehyde and leukemia, but there is no conclusive evidence of the relationship between the concentration of formaldehyde and cancer. Moreover, the "high concentrations of formaldehyde" generally refers to 12 mg / m3 or more, but not more than 1.0 mg / m3. CCTV Focus has put a case for leukemia deaths and decoration formaldehyde linked to and following the exposure. There is a case in Fujian since 4-year-old girl a year later check-formaldehyde rooms have acute leukemia deaths and decoration company claims case, the court upheld part of the plaintiff's claim, the requirements of the decoration company paid the deceased's family 170,000 yuan.
Especially appalling is the home Sohu, Sohu Sohu Finance and Health have to "2.1 million children die each year from national decoration" or a similar title posted articles. Claims to have 2.1 million children die each year decoration pollution. This article is simply nonsense data to be added, in fact, children under 5 years of age each year in China due to various causes of death are about 250,000, well below the 2.1 million. The article also claimed that formaldehyde can cause skin, gastrointestinal tract and oral cancer, and even menstrual disorders, pregnancy syndrome also related with formaldehyde. Said the renovation is suicide like.
In summary, you can not underestimate the pollution caused by in particular, known as the number one decoration formaldehyde pollution should be taken seriously. In the decoration of the design, procurement and construction sectors should pay attention to take measures to minimize contamination. However, do not believe the Internet rumors, fear of renovation, would not stay renovated room. Therefore should not cause stress. Even detection index slightly exceeds the limit, take reasonable remedial measures, can also significantly reduce the formaldehyde pollution, to reduce the potential risks caused by exposure to an acceptable level. Bottom line: the importance of formaldehyde, from the tactics, the strategy from the contempt that it only fitting to add luster, not physical trouble.
look1m (Author: Joe look1m)
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